As for the MT - 25, when removing the bar end, the same thing as the inner weight (Fanatic) is incorporated as a standard. To attach this bar end without replacing the inner weight, you can install it by purchasing a new 30 mm hexagon bolt and a washer with 8 mm diameter 18 mm thick 3.2 mm. Although a genuine hexagon bolt can be used as it is with a length of 20 mm, I think that 30 mm bolt is better because the length becomes a little short. (I think whether adding a rubber washer 1.5 mm etc. is fine, fine adjustment, it can be adjusted only a little because it collapses)
Since the seat end is flat in this bar end, it can be installed while leaving genuine inner weight. I attached the bar end middle type TYPE-2 (Φ 30) and made this a spare, but I think that the installation is similar because the seat of the bar end is flat. # Note Although the hexagon head bolt is 6 millivolts, if the washer is 6 millimeters, the diameter is too small, since the hole of the bar is about 20 millimeters, it will not match the inside diameter of the bar unless the washer is 8 mm hole.